* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  font-size: 100px;
}

.layout {
  width: 100vw;
  min-height: 100vh;
  padding: 0.15rem 0.3rem 0 0.3rem;
  position: relative;
  text-align: center;
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  align-items: center;
}

.layout img {
  display: block;
}

.layout .bg-img {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
}

.layout {
  padding: 1.2rem 0 1.32rem 0;
  height: 100vh !important;
  flex-wrap: inherit !important;
}

.layout .introduce-box {
  min-height: 3.5rem;
  width: 83%;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 15px;
  border: 0.03rem solid #CD3B2B;
  margin-bottom: 0.2rem;
  margin: 0 8% 0.2rem 8%;
}

.layout .back {
  width: 37%;
  margin: 0 auto;
}
